丁集矿1282（3）综采面采空区自燃“三带”划分研究
发布时间：2018-09-14 11:03
【摘要】：煤炭自燃严重阻碍了中国的煤矿安全生产,给我国造成了多达数百亿的直接或间接损失。作为我国煤炭行业主要灾害之一的煤炭自燃,给我国造成的不仅是经济上的损失,而且毁坏了我国在世界范围内的声誉,给我国人民乃至世界人民心目中留下了不可磨灭的阴影,其造成的负面影响不言而喻。 时代和社会的飞跃前进促使机械化大生产成为一个不可抗拒的趋势。在我国广泛施行综合机械化采煤,显著提高了煤炭采出率,考虑到煤矿井下地质条件的多变性,条件成熟时,煤炭自燃就会在综采面的采空区内发生。要想提高矿井的安全性,加大矿井的生产效率,一方面要保证煤矿井下的采出率以及开采的速度,另一方面要研究并分析掌握综采面采空区的煤炭自燃规律。 丁集矿1282(3)综采面下方的1422(1)工作面已回采完毕,1412(1)工作面正在回采,较大的采长和走向长导致采空区面积较大,致使大量的浮煤残留在采空区内。当通风供氧和蓄热条件适宜时就会引发煤炭自燃,迫使工作面的正常回采停止,工作面回采空间内的设备会被严重烧毁,最严重的是诱发火灾和瓦斯爆炸,给井下工作人员的生命安全带来不可估量的伤害。迫在眉睫的任务是从整体上把握住1282(3)工作面采空区的遗煤自燃的规律,对该采空区自燃“三带”的范围进行划分。 在研究如何防治煤炭自然发火这个问题时,首先要做好两个准备；一是深度理解煤炭自燃的机理,二是准确把握煤在低温环境下的氧化规律。单一的研究方法已不能满足对复杂问题的分析,对此,综合的研究方法才是解决复杂问题的有力武器。其中,理论研究是基础,对问题的研究起到支撑的作用；实验室实验的数据分析是辅助,验证理论的可行性；现场试验是数据的来源,具有强大的说服力。以低温环境下的煤氧化吸氧放热为切入点,将吸氧量、失重量、热流量作为研究煤低温氧化时的主要参数；将煤样的粒径作为变量,对比分析煤的吸氧量与放热量之间的关系受粒径大小影响的程度；分析了丁集矿13-I煤的低温氧化规律,结合热力学和传热学理论建立了煤的低温氧化数学模型,以此为依托,得出煤炭最短自燃发火期；根据丁集矿1282(3)工作而的现场实际条件,在下顺槽预埋束管与测温系统装置,每天定时下井,采集各测点对应的采空区内的气体并测量对应点的温度,化验分析各气体组分的浓度,将所得数据进行拟合处理,得出各测点气体浓度和温度随埋深的关系,总结出采空区“三带”的分布规律。根据散热带的宽度和煤的最短自燃发火期,可以确定出该工作面推进速度的临界值(工作面的推进速度不能小于这个值,否则会发生煤炭自燃),从而为预测预报丁集煤矿1282(3)工作面采空区煤炭自然发火提供了最有力的理论和现实依据。
[Abstract]:Spontaneous combustion of coal seriously hinders the safe production of coal mines in China and results in tens of billions of direct or indirect losses. As one of the major disasters in China's coal industry, coal spontaneous combustion not only causes economic losses to our country, but also destroys our country's reputation in the world. It has left an indelible shadow to the people of our country and the world, and the negative effects are self-evident. The rapid advance of the times and society makes mechanized mass production an irresistible trend. Comprehensive mechanized coal mining has been widely carried out in China, which has significantly improved the coal extraction rate. Considering the variability of underground geological conditions, when the conditions are ripe, the spontaneous combustion of coal will occur in the goaf of the fully mechanized coal face. In order to improve the safety of the mine and increase the production efficiency, on the one hand, it is necessary to ensure the mining rate and the speed of mining; on the other hand, it is necessary to study and analyze the law of spontaneous combustion of coal in the goaf of fully mechanized mining face. The 1422 (1) face below 1282 (3) fully mechanized face of Dingji Mine has been mined out. The larger mining length and strike length lead to a large area of goaf, resulting in a large amount of floating coal remaining in the goaf. When the ventilation, oxygen supply and heat storage conditions are suitable, the spontaneous combustion of coal will occur, forcing the normal mining of the working face to stop, and the equipment in the mining space of the working face will be severely burned down, the most serious of which is to induce fire and gas explosion. To the safety of underground workers bring incalculable harm. The urgent task is to grasp the law of coal spontaneous combustion in goaf of 1282 (3) face, and to divide the range of "three zones" of spontaneous combustion in goaf. When studying how to prevent and cure coal spontaneous combustion, two preparations should be made: one is to deeply understand the mechanism of coal spontaneous combustion, the other is to accurately grasp the oxidation law of coal in low temperature environment. A single research method can not satisfy the analysis of complex problems. Therefore, comprehensive research method is a powerful weapon to solve complex problems. Among them, the theoretical research is the foundation, plays a supporting role to the research of the problem; the data analysis of the laboratory experiment is auxiliary, verifies the feasibility of the theory; the field test is the source of the data, has the powerful persuasive power. The oxygen absorption, weight loss and heat flux are taken as the main parameters in the study of coal oxidation at low temperature, and the particle size of coal sample is taken as a variable. The relationship between oxygen absorption and heat release of coal is analyzed by contrast, and the low temperature oxidation law of 13-I coal in Dingji Mine is analyzed, and the mathematical model of coal oxidation at low temperature is established based on thermodynamics and heat transfer theory. The shortest spontaneous combustion period of coal is obtained, and according to the actual working conditions of 1282 (3) in Dingji Mine, the preset beam tube and temperature measuring system device in the lower trench are used to set down the well every day, to collect the gas in the goaf corresponding to each measuring point and to measure the temperature of the corresponding point. By analyzing the concentration of each gas component and fitting the data, the relationship between gas concentration and temperature with buried depth is obtained, and the distribution rule of "three zones" in goaf is summarized. According to the width of the radiating zone and the shortest spontaneous combustion period of coal, the critical value of the working face's advancing speed can be determined. Otherwise, the spontaneous combustion of coal will occur, which provides the most powerful theoretical and practical basis for forecasting and forecasting the spontaneous combustion of coal in the goaf of 1282 (3) face of Dingji Coal Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD75
本文编号：2242517
[Abstract]:Spontaneous combustion of coal seriously hinders the safe production of coal mines in China and results in tens of billions of direct or indirect losses. As one of the major disasters in China's coal industry, coal spontaneous combustion not only causes economic losses to our country, but also destroys our country's reputation in the world. It has left an indelible shadow to the people of our country and the world, and the negative effects are self-evident. The rapid advance of the times and society makes mechanized mass production an irresistible trend. Comprehensive mechanized coal mining has been widely carried out in China, which has significantly improved the coal extraction rate. Considering the variability of underground geological conditions, when the conditions are ripe, the spontaneous combustion of coal will occur in the goaf of the fully mechanized coal face. In order to improve the safety of the mine and increase the production efficiency, on the one hand, it is necessary to ensure the mining rate and the speed of mining; on the other hand, it is necessary to study and analyze the law of spontaneous combustion of coal in the goaf of fully mechanized mining face. The 1422 (1) face below 1282 (3) fully mechanized face of Dingji Mine has been mined out. The larger mining length and strike length lead to a large area of goaf, resulting in a large amount of floating coal remaining in the goaf. When the ventilation, oxygen supply and heat storage conditions are suitable, the spontaneous combustion of coal will occur, forcing the normal mining of the working face to stop, and the equipment in the mining space of the working face will be severely burned down, the most serious of which is to induce fire and gas explosion. To the safety of underground workers bring incalculable harm. The urgent task is to grasp the law of coal spontaneous combustion in goaf of 1282 (3) face, and to divide the range of "three zones" of spontaneous combustion in goaf. When studying how to prevent and cure coal spontaneous combustion, two preparations should be made: one is to deeply understand the mechanism of coal spontaneous combustion, the other is to accurately grasp the oxidation law of coal in low temperature environment. A single research method can not satisfy the analysis of complex problems. Therefore, comprehensive research method is a powerful weapon to solve complex problems. Among them, the theoretical research is the foundation, plays a supporting role to the research of the problem; the data analysis of the laboratory experiment is auxiliary, verifies the feasibility of the theory; the field test is the source of the data, has the powerful persuasive power. The oxygen absorption, weight loss and heat flux are taken as the main parameters in the study of coal oxidation at low temperature, and the particle size of coal sample is taken as a variable. The relationship between oxygen absorption and heat release of coal is analyzed by contrast, and the low temperature oxidation law of 13-I coal in Dingji Mine is analyzed, and the mathematical model of coal oxidation at low temperature is established based on thermodynamics and heat transfer theory. The shortest spontaneous combustion period of coal is obtained, and according to the actual working conditions of 1282 (3) in Dingji Mine, the preset beam tube and temperature measuring system device in the lower trench are used to set down the well every day, to collect the gas in the goaf corresponding to each measuring point and to measure the temperature of the corresponding point. By analyzing the concentration of each gas component and fitting the data, the relationship between gas concentration and temperature with buried depth is obtained, and the distribution rule of "three zones" in goaf is summarized. According to the width of the radiating zone and the shortest spontaneous combustion period of coal, the critical value of the working face's advancing speed can be determined. Otherwise, the spontaneous combustion of coal will occur, which provides the most powerful theoretical and practical basis for forecasting and forecasting the spontaneous combustion of coal in the goaf of 1282 (3) face of Dingji Coal Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD75
【参考文献】
相关期刊论文 前10条
1 李宗翔,吴志君,王振祥;采空区遗煤自燃升温过程的数值模型及其应用[J];安全与环境学报;2004年06期
2 徐精彩,葛岭梅,贺敦良;煤炭低温自燃过程的研究[J];煤炭工程师;1989年05期
3 马成军;白利文;申立华;;采空区自燃“三带”分布规律及影响因素分析[J];华北科技学院学报;2008年01期
4 宋志,曹坤,孙宝铮;采场自然发火的预测和识别[J];黑龙江矿业学院学报;1999年03期
5 王广军;何启林;;采空区“三带”宽度的研究与测定[J];科技信息;2009年03期
6 李宗翔,孙广义,王继波;综放工作面煤柱内漏风与耗氧过程的数值模拟[J];力学与实践;2001年04期
7 张玉贵;镜煤和丝炭自燃倾向性研究[J];煤矿安全;1991年12期
8 王永湘;利用指标气体预测预报煤矿自燃火灾[J];煤矿安全;2001年06期
9 李庆军;万清生;周金生;张辛亥;;东荣三矿综一轻放面自燃危险性预测[J];煤矿安全;2006年09期
10 张树川;秦永洋;高松;戴广龙;;高瓦斯综采面Y型通风采空区漏风规律研究[J];煤炭科学技术;2009年10期
，本文编号：2242517
本文链接：https://www.wllwen.com/kejilunwen/anquangongcheng/2242517.html
